Leaked emails from the private U.S. security firm Stratfor cite a Mexican diplomat who says the U.S. government works with Mexican cartels to traffic drugs into the United Statesandhas sided with the Sinaloa cartel in an attempt to limit the violence in Mexico.

Many people have doubted the quality of Stratfor’s intelligence, but the information from MX1—a Mexican foreign service officer who doubled as a confidential source for Stratfor—seems to corroborate recent claims about U.S. involvement in the drug war in Mexico.